Please use this identifier to cite or link to this item: https://www.um.edu.mt/library/oar/handle/123456789/70767
Title: A fluorescent combinatorial logic gate with Na+, H+-enabled OR and H+-driven low-medium-high ternary logic functions
Authors: Spiteri, Jasmine M. A.
Mallia, Carl J.
Scerri, Glenn J.
Magri, David C.
Keywords: Charge transfer -- Research
Fluorescence
Oxidation-reduction reaction
Hydrogen-ion concentration
Issue Date: 2017
Publisher: Royal Society of Chemistry
Citation: Spiteri, J. M., Mallia, C. J., Scerri, G. J., & Magri, D. C. (2017). A fluorescent combinatorial logic gate with Na+, H+-enabled OR and H+-driven low-medium-high ternary logic functions. Organic & Biomolecular Chemistry, 15(47), 10116-10121.
Abstract: A novel fluorescent molecular logic gate with a ‘fluorophore–spacer1–receptor1–spacer2–receptor2’ format is demonstrated in 1 : 1 (v/v) methanol/water. The molecule consists of an anthracene fluorophore, and tertiary alkyl amine and N-(2-methoxyphenyl)aza-15-crown-5 ether receptors. In the presence of threshold concentrations of H+ and Na+, the molecule switches ‘on’ as an AND logic gate with a fluorescence quantum yield of 0.21 with proton and sodium binding constants of log βH+ = 9.0 and log βNa+ = 3.2, respectively. At higher proton levels, protonation also occurs at the anilinic nitrogen atom ether with a log βH+ = 4.2, which allows for Na+, H+-enabled OR (OR + AND circuit) and H+-driven ternary logic functions. The reported molecule is compared and contrasted to classic anthracene-based Na+ and H+ logic gates. We propose that such logic-based molecules could be useful tools for probing the vicinity of Na+, H+ antiporters in biological systems.
Description: Electronic supplementary information (ESI) available: Synthetic and experimental details, UV-vis absorption spectra, NMR, IR and mass spectra. See DOI: 10.1039/c7ob01828b
URI: https://www.um.edu.mt/library/oar/handle/123456789/70767
Appears in Collections:Scholarly Works - FacSciChe



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